PLSQL Access Provider 

The PLSQL access provider will allow invocations of server operations from PLSQL code executing within Oracle 8.1.6 (or higher) database. The PLSQL access provider is used to send messages, call outbound BizAPIs, and to invoke any operation implemented with IFS Application Server.

Important! Synchronous invocations will execute in their own transactions, separate to any open transaction within Oracle. An Oracle rollback after a synchronous invocation using PLSQL access provider will not roll back the effects of the invocation. However asynchronous postings done with for example Post_Message will be part of the Oracle transaction and included in rollbacks.

Reference Material